Poa borneensis

HABIT Perennial; caespitose; clumped densely. Butt sheaths purple. Culms erect; 20–30 cm long; 3–4 -noded. Lateral branches lacking. Leaves mostly basal. Ligule an eciliate membrane; 4 mm long; obtuse. Leaf-blades filiform; conduplicate, or involute; 5–15 cm long; 0.5–0.75 mm wide. Leaf-blade surface glabrous.

INFLORESCENCE Inflorescence a panicle.

Panicle open; lanceolate; 3–5 cm long. Primary panicle branches ascending; 2–3 -nate; 1 cm long; bearing spikelets almost to the base. Panicle branches scabrous.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 1–2 fertile florets; with a barren rhachilla extension. Spikelets ovate; laterally compressed; 3–4 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus glabrous.

GLUMES Glumes persistent; similar; shorter than spikelet. Lower glume lanceolate; 1.5 mm long; 0.6 length of upper glume; membranous; 1-keeled; 1 -veined. Lower glume lateral veins absent. Lower glume apex acute. Upper glume lanceolate; 2.5 mm long; 0.7 length of adjacent fertile lemma; membranous; 1-keeled; 1(–3) -veined. Upper glume lateral veins absent, or obscure. Upper glume apex acute.

FLORETS Fertile lemma oblong; elliptic in profile; 3.5 mm long; herbaceous; keeled; 5 -veined. Lemma apex acute. Palea keels scabrous; adorned above.

FLOWER Lodicules 2; membranous. Anthers 3; 0.5 mm long.

FRUIT Caryopsis with adherent pericarp.

DISTRIBUTION Asia-tropical: Malesia.

NOTES Poeae. Jansen 1992.

Please cite this publication as detailed in How to Cite Version: 3rd February 2016.